"These products are not legal and it means that you don't know if the consistency is there," he said.

"It could have contaminates, we don't know those things. Maybe they're very good quality, maybe they're not. It's hard to know that when it's not regulated."

The Government insists the current system is working, telling A Current Affair there has been a significant increase in successful applications under the Special Access Scheme - with more than 2200 approved in July this year.